398577 has 4 divisors (see below), whose sum is σ = 531440. Its totient is φ = 265716.

The previous prime is 398569. The next prime is 398581. The reversal of 398577 is 775893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 775893 = 3 ⋅258631.

It is not a de Polignac number, because 398577 - 2³ = 398569 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (398557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66427 + ... + 66432.

It is an arithmetic number, because the mean of its divisors is an integer number (132860).

2³⁹⁸⁵⁷⁷ is an apocalyptic number.

It is an amenable number.

398577 is a deficient number, since it is larger than the sum of its proper divisors (132863).

398577 is a wasteful number, since it uses less digits than its factorization.

398577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132862.

The product of its digits is 52920, while the sum is 39.

The square root of 398577 is about 631.3295494431. The cubic root of 398577 is about 73.5931532108.

The spelling of 398577 in words is "three hundred ninety-eight thousand, five hundred seventy-seven".